1001945 has 8 divisors (see below), whose sum is σ = 1374144. Its totient is φ = 687024.

The previous prime is 1001941. The next prime is 1001947. The reversal of 1001945 is 5491001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001945 - 2² = 1001941 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14279 + ... + 14348.

It is an arithmetic number, because the mean of its divisors is an integer number (171768).

2^1001945 is an apocalyptic number.

It is an amenable number.

1001945 is a deficient number, since it is larger than the sum of its proper divisors (372199).

1001945 is an equidigital number, since it uses as much as digits as its factorization.

1001945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28639.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1001945 is about 1000.9720275812. The cubic root of 1001945 is about 100.0647913451.

Adding to 1001945 its reverse (5491001), we get a palindrome (6492946).

The spelling of 1001945 in words is "one million, one thousand, nine hundred forty-five".